Fed Biz and Guilt Trip, the one-three finishers in a three-horse photo in the San Fernando Stakes (gr. II), worked six furlongs in company on Santa Anita's wet/fast main track on the morning of Jan. 27 for the Strub Stakes.

Veterinarians and breeding farm managers regularly examine stallion semen samples under a microscope to check sperm motility, especially samples from horses with suspected fertility issues. But while they can check sperm for this common fertility measure on the farm or in the average veterinary clinic, evaluating sperm morphology--to ensure the head, midp...